CVE-2019-1756
No exploitation reported by the sources we read.
- Published2019-03-28
- WeaknessCWE-20
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
A vulnerability in Cisco IOS XE Software could allow an authenticated, remote attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability occurs because the affected software improperly sanitizes user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying a username with a malicious payload in the web UI and subsequently making a request to a specific endpoint in the web UI. A successful exploit could allow the attacker to run arbitrary commands as the root user, allowing complete compromise of the system.
Timeline
dates in UTC- 2019-03-2801:29CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-1756?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-1756?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.2 | = 3.2.0ja | no fix published | NVD |
| 16.7 | = 16.7.1 | no fix published | NVD |
| 16.7 | = 16.7.1a | no fix published | NVD |
| 16.7 | = 16.7.1b | no fix published | NVD |
| 16.7 | = 16.7.2 | no fix published | NVD |
| 16.7 | = 16.7.3 | no fix published | NVD |
| 16.8 | = 16.8.1 | no fix published | NVD |
| 16.8 | = 16.8.1a | no fix published | NVD |
| 16.8 | = 16.8.1b | no fix published | NVD |
| 16.8 | = 16.8.1c | no fix published | NVD |
| 16.8 | = 16.8.1d | no fix published | NVD |
| 16.8 | = 16.8.1e | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 11.0 | = 11.0\(20.3\) | no fix published | NVD |
| 16.9 | = 16.9\(1\) | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- tools.cisco.comPatch · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Published
- 2019-03-28
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2019-1756?
Is CVE-2019-1756 actively exploited?
What is the CVSS score for CVE-2019-1756?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.